Silversvt...
I too have been irritated by the cycling of the a/c comp in defrost so, when I read your thread I decided to do it.
It's not too hard. Pull out the HVAC control panel. On top of the middle selector knob switchbox is a 4 wire harness. The GREEN/red and GREEN/orange control the compressor. The GREEN/red is HOT when the selector is moved from the off position so I tapped that wire to power the switch/relay (12v 30amp rating). I cut the GREEN/orange line (must be ground cause it's never hot)and installed the switching relay. Now the compressor is turned on or off manually and cycles normally when switched on. If you have basic electrical skills this should be easy if not let me know I will email you with more details. If you're wondering why a relay...the wires are pretty heavy 12-14ga so I thought a relay would be required if you wanted to use a tiny/cute switch. In my profile is a link to WebShots and a "car stuff" photo album...that will be worth 1000 words. Now the problem is a cool place to mount the switch...I don't really want to drill a hole in my dash!
...Ed
Hmmm...photo isn't posted yet, might take a little while...
